name: Build translation cache

# Regenerates lang/*.json whenever a bash script under scripts/ changes.
# The runtime translate() in scripts/utils.sh reads these JSON files and
# falls back to the English source on miss, so keeping them up-to-date is
# what makes ProxMenux multilingual without any runtime googletrans
# dependency on the user's host.
#
# Triggers:
#   - push to develop touching scripts/**/*.sh
#   - manual via workflow_dispatch (force --refresh)

on:
  push:
    branches: [develop]
    paths:
      - 'scripts/**/*.sh'
      - 'menu'
      - 'install_proxmenux.sh'
      - 'install_proxmenux_beta.sh'
      - '.github/scripts/build_translation_cache.py'
      - '.github/workflows/build-translation-cache.yml'
  workflow_dispatch:
    inputs:
      refresh:
        description: 'Re-translate every entry (ignore cached values)'
        type: boolean
        default: false

# Avoid two cache rebuilds from racing each other on the same branch and
# fighting over the auto-commit.
concurrency:
  group: build-translation-cache-${{ github.ref }}
  cancel-in-progress: false

jobs:
  rebuild-cache:
    runs-on: ubuntu-latest
    permissions:
      contents: write   # auto-commit lang/*.json back to develop

    steps:
      - name: Checkout develop
        uses: actions/checkout@v4
        with:
          ref: develop
          # Need full history so the auto-commit doesn't fail when the
          # cache job runs minutes after the trigger push (GH default
          # fetch-depth=1 sometimes diverges from origin/develop after a
          # quick follow-up push).
          fetch-depth: 0
          # Use a PAT (or default GITHUB_TOKEN if branch protections allow
          # it) so the push back to develop actually fires later steps
          # (workflow runs from auto-commits) if you ever need them.
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install googletrans
        run: |
          python -m pip install --upgrade pip
          # 4.0.0-rc1 is the same pin that build_translation_cache.py
          # was written against. Bump in lockstep with the script.
          pip install 'googletrans==4.0.0-rc1' 'httpx==0.13.3' 'httpcore==0.9.1' 'h11==0.9.0'

      - name: Regenerate lang/*.json
        run: |
          REFRESH_FLAG=""
          if [[ "${{ github.event.inputs.refresh }}" == "true" ]]; then
            REFRESH_FLAG="--refresh"
          fi
          # Extra files outside scripts/ that also contain translate "..."
          # calls. Keep this list in sync with the `paths` trigger above.
          python .github/scripts/build_translation_cache.py \
            --scripts-dir scripts \
            --extra-file menu \
            --extra-file install_proxmenux.sh \
            --extra-file install_proxmenux_beta.sh \
            --output-dir lang \
            --provider googletrans \
            $REFRESH_FLAG

      - name: Commit + push if changed
        run: |
          if git diff --quiet -- lang/; then
            echo "No translation changes — skipping commit."
            exit 0
          fi
          git config user.name  "ProxMenuxBot"
          git config user.email "bot@proxmenux.local"
          git add lang/
          git commit -m "chore(lang): auto-rebuild translation cache

          Source: ${GITHUB_SHA::7}
          Triggered by: ${{ github.event_name }}"
          git push origin develop